Better inline model resolver to handle inline schema in array item (#12104)

* better support of inline schema in array item

* update tests

* update samples

* regenerate samples

* fix allof naming, remove files

* add files

* update samples

* update readme

* fix tests

* update samples

* update samples

* add new files

* update test spec

* add back tests

* remove unused files

* comment out python test

* update js test using own spec

* remove files

* remove unused files

* remove files

* remove unused files

* better handling of allOf with a single type

* comment out go test

* remove test_all_of_with_single_ref_single_ref_type.py

* fix inline resolver, uncomment go test

samples/client/petstore/ruby/.openapi-generator/FILES

@@ -6,6 +6,7 @@ Gemfile
 README.md
 Rakefile
 docs/AdditionalPropertiesClass.md
+docs/AllOfWithSingleRef.md
 docs/Animal.md
 docs/AnotherFakeApi.md
 docs/ApiResponse.md
@@ -53,12 +54,12 @@ docs/OuterObjectWithEnumProperty.md
 docs/Pet.md
 docs/PetApi.md
 docs/ReadOnlyFirst.md
+docs/SingleRefType.md
 docs/SpecialModelName.md
 docs/StoreApi.md
 docs/Tag.md
 docs/User.md
 docs/UserApi.md
-docs/UserType.md
 git_push.sh
 lib/petstore.rb
 lib/petstore/api/another_fake_api.rb
@@ -72,6 +73,7 @@ lib/petstore/api_client.rb
 lib/petstore/api_error.rb
 lib/petstore/configuration.rb
 lib/petstore/models/additional_properties_class.rb
+lib/petstore/models/all_of_with_single_ref.rb
 lib/petstore/models/animal.rb
 lib/petstore/models/api_response.rb
 lib/petstore/models/array_of_array_of_number_only.rb
@@ -114,10 +116,10 @@ lib/petstore/models/outer_enum_integer_default_value.rb
 lib/petstore/models/outer_object_with_enum_property.rb
 lib/petstore/models/pet.rb
 lib/petstore/models/read_only_first.rb
+lib/petstore/models/single_ref_type.rb
 lib/petstore/models/special_model_name.rb
 lib/petstore/models/tag.rb
 lib/petstore/models/user.rb
-lib/petstore/models/user_type.rb
 lib/petstore/version.rb
 petstore.gemspec
 spec/api_client_spec.rb